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- W1968031522 abstract "To search for impairment of neuromuscular transmission by single-fiber electromyography (SFEMG) in patients with common forms of migraine.P/Q Ca(2+) channels are genetically abnormal in most cases of familial hemiplegic migraine (International Headache Society [IHS] code 1.2.3) and may be involved in other types of migraine. Besides in the brain, these channels are found in motor nerve endings, where they control stimulation-induced acetylcholine release. If they are functionally abnormal, the neuromuscular transmission might be impaired.Sixty-two migraineurs (18 without aura, IHS code 1.1; 19 with typical aura, IHS code 1.2.1; 10 with prolonged aura, IHS code 1.2.2; 15 with and without aura) and 16 healthy control subjects underwent stimulation SFEMG. Results were expressed as the mean value of consecutive differences (MCD) and percentage of single-fiber abnormalities (abnormal jitter or impulse blocking).Average MCD was comparable in control subjects and migraineurs (17.1 +/- 2.6 versus 17.5 +/- 4.7 microsec). By contrast, single-fiber abnormalities were found in 17 patients but in none of the control subjects (p = 0.036). Most of these patients had unilateral sensorimotor symptoms and/or aphasia and/or loss of balance during the aura. SFEMG abnormalities were significantly correlated with the occurrence of these clinical features and with a diagnosis of migraine with prolonged aura.Stimulation SFEMG shows mild abnormalities of neuromuscular transmission in a subgroup of migraineurs with aura, characterized by clinical features frequently found in human P/Q Ca(2+) channelopathies. These abnormalities might thus be due to genetically modified P/Q Ca(2+) channels." @default.
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- W1968031522 date "2001-04-24" @default.
- W1968031522 modified "2023-10-16" @default.
- W1968031522 title "Neuromuscular transmission in migraine: A single-fiber EMG study in clinical subgroups" @default.
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- W1968031522 doi "https://doi.org/10.1212/wnl.56.8.1038" @default.
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